Stoker distributing means



Aug. 19, 1930. I A. M. HUNT 1,773,103

STOKER DI STRI BUT ING MEANS Filed Jan. 2'7, 1925 INVENTOR ATTORNEYPatented Aug. 19, 1930 UNITED STATES PATENT OFF'ICE ANDREW M. HUNT, OFNEW YORK, N. Y., ASSIGNOR TO STANDARD STOKER COMPANY, INCORPORATED, ACORPORATION OF DELAWARE s'roxna msranornts mmns Application filedIilanuary 27, 1925. Serial No. 5,027

' This invention relates to stokers and particularly to an improvedmeans for distributlngz oal over the fire by jets of steam or other Inthe embodiment of my invention herein illustrated, I have shown alocomotive stoker wherein coal is mechanically conveyed from thelocomotive tender to a point in the fire-box below the grate and is thenelevated through a suitable conduit toa point above the fire where it isacted upon by jets of steam or other fluid which carry and distributethe coal evenly over the fire.

' Among the objects of my invention is to improve the efficiency of thecoal distributing jets'by increasing the kinetic energy and carryingpower of the steam as it issues from r the jet forming openings. Forthis purpose, I form jet forming openings of progressively increasingarea and I so arrange these openings as to obtain a maximum efiect onthe entire mass of coal delivered to the fire box.

Various other objects and advantages of my invention will appear fromthe following description taken in connection with the accompanyingdrawing which shows one embodiment of my invention and wherein Fig. 1 isa side view, partly in section, of the forward end of a stokerdisclosing my improved distributing means, Fig. 2 is a plan view of aportion o f the structure shown in F ig. 1, Fig. 3 is a section taken onthe line 38 of Fig.

. 1, and Fig. 4 is a front elevation of the jet distributing head.

Referring to Fig. 1, the numeral 10 represents the rear water leg of alocomotive boiler on the fuel core at one side 'as it rises; and

provided with a feed door opening 11 above the cab deck 12. Goal iscarried from the locomotive tender (not shown) by means of a conduit 15which contains the conveyor screw 16; At the forward end of the conduit15 is "an elbow 18 and in the form of stoker illustrated, the conveyorscrew 16 terminates at the elbow and the remainder of the conveyving-conduit is formed as an u wardly extending slightly expandingsection 20 which is free from any conveying mechanism. The section 20terminates in a discharge mouth 21 which is surrounded b the protectivegratS 22 and is provided wit a steam jet distr1butributor tor 24. Thedistributor comprises a distributor head 25 having substantially radialexpanding nozzles or openings 26-which are supplied from separate steamchambers 29 formed in the distributor head. Each of these chambers issupplied with steam by a v pipe 27 as shown. Each of the pipes isprovided with an adjustable valve 28, one only.

ward curve of the elbow and through the unobstructed section 20 to themouth 21, where it comes into the path of the steam jets, which issuefrom the openings 26. As shown in Figs. 2 and 3, these openings arearranged so that the series of jets form a sheet or sheets of propellingfluid which pick up and carry the coal as it issues from the mouth 21and distribute it over the fire. In the preferred form of my invention,the openings 26 expand laterally, rather than vertically, and in thismanner I confine the sheet of propelling fluid to the proper verticaldimensions.

It will be'observed that by the present invention there is provided incombination in a locomotive stoker, open-mouthed means for elevatingfuel in the combustion chamber in'a s mmetrical consolidated core, adisliead adjacent to the mouth of said means and having a wedge-shapedbottom partly overlying said mouth and operative that said distributorhead has a steam supply and also a jet forming .opening flaring orspreading progressively outward in a horizontal direction and disposedat an angle to the fuel core, the construction being such thatthepressure head of steam is rapidly converted into velocity and the jet isspread out fan-wise in such a position as to slice or cut oil? the topportion of the advancing fuel core immediately after it passes out ofthe mouth of the elbowed conduit, which, to-

gether with the feed screw, is comprised in the said open mouthed means.

vancing fuel core. 2. In a locomotive stoker, open-mouthed I claim:

1. In a locomotive stoker, open-mouthed means for elevating fuel in thecombustion chamber in asymmetrical consolidated core, and a distributorhead adjacent to the mouth of said means and having a wedge-shaped'bottom partly overlying said mouth and operative on said core at oneside as it rises, said distributor head having a steam supply and ajet-forming opening flaring progressively outward in a horizontaldirection and.

disposed at an angle to the core of the fuel to rapidly convert thepressurehead of steam into velocity and spread the jet fan-wise to sliceor cut ofi the top of the upwardl admeans for elevating fuel into thecombustion chamber in a symmetrical core, and a distributor headadjacent to the mouth of said means,,said distributor head having asteam supply and a passage o enin therefrom, which flares laterally anwit out vertical flaring from its inlet to its outlet for converting thepressure head of the steam into velocity and for spreadin a jet of steamtherefrom fan-wise so that it is horizontall disposed and at an angle tothe core of fue said Jet operating to slice or cut ofi the top portionof the upwardly advancing fuel core whose movement-is always atsubstantially {right angles to the fan-wise steam jet..

, 3. In a locomotive stoker, open-mouthed means for elevating fuel intothe combustion chamber in a syminetrical consolidated core, and adistributor head attached to the mouth portion of said means within thecombustion chamber of the locomotive and having a wedge-shaped bottom toprevent obstruction of a side portion of the fuel core as it leaves themouth of said means, said distributor head'having a steam suppl and aplurality rs above said of separate steam eham wedge-shaped bottom,

and also a plurality ofi radially disposed assageways leading from saidsteam ch'am rs, which pass eways flare horizontally from inlet to outletor v converting the pressure head of steam rap- 'ldly into velocity and,for spreading the jets therefrom into a continuous horizontal sheetwhich is eflecti've to shoe or cut ofl the top of the upwardly advancinfuel core.

' ANDR W M. HUN T.

